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The Encyclopedia of Horology

Wristwatch · Art deco tonneau wristwatch

Tiffany & Co. Diamond and Platinum Wristwatch by Agassiz

Partially verified

This Art Deco tonneau-shaped wristwatch dates to circa 1920 and was crafted in platinum by Agassiz for retailer Tiffany & Co. The source reports that the case features a diamond-set bezel, foliate engraving along its sides, and a beaded winding crown engraved with a flower. The silvered dial, stated by the source to have been produced by Stern Frères, is signed 'TIFFANY & CO' with stylized Arabic numerals, an inner minute track, and blued steel Breguet-style hands. Measuring 20 mm in width and 25 mm from lug tip to lug tip, the watch houses a 17-jewel manual-wind movement recorded as number 210414 inside case number 962.

Front view of the tonneau platinum wristwatch with diamond bezel and black leather strap
Front view of the tonneau platinum wristwatch with diamond bezel and black leather strap — Renaissance Antiques. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.renaissanceantiques.com
Category
Wristwatch · Art deco tonneau wristwatch
Maker / attribution
Agassiz (for Tiffany & Co.)
Reference
Not recorded
Catalogue / lot identifier
SSHO 3735
Source-reported date
circa 1920
Country
Switzerland
Source-reported serial
210414

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and External Construction

The timepiece features an Art Deco tonneau-shaped case in platinum, featuring a diamond-set bezel. The watch is fitted with a beaded winding crown.

The source describes the side of the case as having foliate engraving and the crown as being engraved with a flower. The watch measures 20 mm in width and 25 mm from lug tip to lug tip.

Evidence for this section
  • “tonneau-shaped case”
  • “gleaming platinum by Agassiz for Tiffany & Co.”
  • “diamond bezel”
  • “beautifully engraved foliate embellishment on every side”
  • “winding crown is finely beaded and engraved with a flower”
  • “25mm Lug Tip to Lug Tip 20mm Width”

Dial and Visual Appointments

The silvered dial is signed 'TIFFANY & CO' and features Arabic numerals and blued steel Breguet-style hands.

The source attributes the production of the dial to the supplier Stern Frères.

Evidence for this section
  • “silvered dial with bold Arabic numerals and blued steel Breguet-style hands”
  • “dial for this watch was made by Stern Frères”

Movement and Technical Data

The watch is powered by a 17-jewel manual-wind movement, reported by the source as serial number 210414. The case is reported to be numbered 962.

The date of the piece is cited by the source as circa 1920.

Evidence for this section
  • “17 jewel manual wind high grade movement”
  • “Movement #210414”
  • “Case #962”
  • “Circa 1920”

Open research questions

  • Does case number 962 correlate with verifiable Agassiz production records for the circa 1920 period?
  • Is there documented evidence confirming Stern Frères as the dial manufacturer for this specific movement serial number?
  • Are there archival examples of Agassiz tonneau cases from this era featuring this specific style of foliate engraving?

Source evidence

Recorded claims and source quotations for Tiffany & Co. Diamond and Platinum Wristwatch by Agassiz
FieldSource-reported valueSource quotation
RetailerTiffany & Co.“It was expertly crafted in an exquisitely designed case of gleaming platinum by Agassiz for Tiffany & Co.”
MakerAgassiz“Tiffany & Co. Diamond and Platinum Wristwatch by Agassiz”
Case MaterialPlatinum“gleaming platinum by Agassiz for Tiffany & Co.”
Movement Serial Number210414“Movement #210414”
Case Number962“Case #962”
Jewel Count17 jewels“17 jewel manual wind high grade movement”
Dial MakerStern Frères“dial for this watch was made by Stern Frères”
Dimensions25mm Lug Tip to Lug Tip, 20mm Width“25mm Lug Tip to Lug Tip 20mm Width”
RetailerTiffany & Co.“crafted in an exquisitely designed case of gleaming platinum by Agassiz for Tiffany & Co.”
MakerAgassiz“Tiffany & Co. Diamond and Platinum Wristwatch by Agassiz”

Visible details

  • Tonneau-shaped platinum case fitted with a single row of diamonds along the bezel.
  • Light silvered dial signed 'TIFFANY & CO' featuring stylized Arabic numerals and blued Breguet-style hands.
  • Beaded winding crown visible at the 3 o'clock position.
  • Fitted to a black leather strap with embossed alligator or crocodile grain.

Research qualifications

  • Movement number 210414 and case number 962 are source-reported and not visible in the front photograph.
  • Side foliate engravings and Stern Frères dial attribution are stated by the source without independent photographic confirmation.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Tiffany & Co. Diamond and Platinum Wristwatch by Agassiz - Renaissance Antiques

Reviewed 2026-10-25 · Record cb22f7d803

Terms in this record

Glossary explanations for terms named in this object’s record.

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